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  2. Synchroscope - Wikipedia

    en.wikipedia.org/wiki/Synchroscope

    In AC electrical power systems, a synchroscope is a device that indicates the degree to which two systems (generators or power networks) are synchronized with each other. [ 1 ] For two electrical systems to be synchronized, both systems must operate at the same frequency , and the phase angle between the systems must be zero (and two polyphase ...

  3. Hobbs meter - Wikipedia

    en.wikipedia.org/wiki/Hobbs_meter

    A Hobbs Meter made by General Electric about 1970. Hobbs meter is a generic trademark for devices used in aviation to measure the time that an aircraft is in use. The meters typically display hours and tenths of an hour, but there are several ways in which the meter may be activated: It can measure the time that the electrical system is on.

  4. Synchronization (alternating current) - Wikipedia

    en.wikipedia.org/wiki/Synchronization...

    The sequence of events is similar for manual or automatic synchronization. The generator is brought up to approximate synchronous speed by supplying more energy to its shaft - for example, opening the valves on a steam turbine, opening the gates on a hydraulic turbine, or increasing the fuel rack setting on a diesel engine. The field of the ...

  5. Automatic generation control - Wikipedia

    en.wikipedia.org/wiki/Automatic_generation_control

    An electrical grid may have many types of generators and loads; generators must be controlled to maintain stable operation of the system. In an electric power system, automatic generation control (AGC) is a system for adjusting the power output of multiple generators at different power plants, in response to changes in the load. Since a power ...

  6. Tachometer - Wikipedia

    en.wikipedia.org/wiki/Tachometer

    A tachometer on a tractor, reading up to 3000 RPM, with the hour meter below it showing 772.9 hours. The mark at 2500 RPM is the engine speed required to run the power take-off at 540 RPM. Traffic engineering

  7. Clock generator - Wikipedia

    en.wikipedia.org/wiki/Clock_generator

    A clock generator is an electronic oscillator that produces a clock signal for use in synchronizing a circuit's operation. The output clock signal can range from a simple symmetrical square wave to more complex arrangements. The basic parts that all clock generators share are a resonant circuit and an amplifier.

  8. Multimeter - Wikipedia

    en.wikipedia.org/wiki/Multimeter

    Hand-held meters use batteries, while bench meters usually use mains power; either arrangement allows the meter to test devices. Testing often requires that the component under test be isolated from the circuit in which they are mounted, as otherwise stray or leakage current paths may distort measurements.

  9. Function generator - Wikipedia

    en.wikipedia.org/wiki/Function_generator

    Frequency stability of 0.1 percent per hour for analog generators [5] or 500 ppm for a digital generator. Maximum sinewave distortion of about 1% (accuracy of diode shaping network) for analog generators. [6] Arbitrary waveform generators may have distortion less than -55 dB below 50 kHz and less than -40 dB above 50 kHz.

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